diff --git a/theme-arc-blue.css b/theme-arc-blue.css
index 9e47535..0bc76a9 100644
--- a/theme-arc-blue.css
+++ b/theme-arc-blue.css
@@ -1133,3 +1133,9 @@
     color: #ada;
     background-color: #242;
   }
+  .tag-code, .tag-code td {
+    border-color: #889 !important;
+  }
+  .repository .diff-file-box .code-diff-split tbody tr.add-code {
+    border-color: #333;
+  }